985936840 has 96 divisors (see below), whose sum is σ = 2643694200. Its totient is φ = 329763840.

The previous prime is 985936807. The next prime is 985936859. The reversal of 985936840 is 48639589.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 783216196 + 202720644 = 27986^2 + 14238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74226 + ... + 86494.

Almost surely, 2^985936840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985936840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321847100).

985936840 is an abundant number, since it is smaller than the sum of its proper divisors (1657757360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

985936840 is a wasteful number, since it uses less digits than its factorization.

985936840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12335 (or 12324 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 985936840 is about 31399.6312080254. The cubic root of 985936840 is about 995.2901319692.

The spelling of 985936840 in words is "nine hundred eighty-five million, nine hundred thirty-six thousand, eight hundred forty".